NAME

SYNOPSIS

align_image_stack [options] input files

DESCRIPTION

align_image_stack is used for the alignment of slightly misaligned images or for the
registration of a stereo images pair. When several differently exposed images are
taken in the process of creating a High Dynamic Range image, the images are not
perfectly aligned, and the quality of the

HDR

image created will suffer from this.
align_image_stack uses the tools available to hugin to optimize the roll, pitch and
yaw, as well as some parameters of the lens geometry, to align the images.

OPTIONS

Modes of operation:

-pfile

Output .pto file (useful for debugging, or further refinement)

-aprefix

Output aligned images as prefix_xxxx.tif

-ooutput

Align images and merge them to

HDR,

generate output.hdr

Modifiers:

-v

Verbose, print progress messages. Repeat for higher verbosity

-e

Assume input images are full frame fish eye (default: rectilinear)

-tnum

Remove all control points with an error higher than num pixels
(default: 3)

--corr=num

Correlation threshold for identifying control points (default: 0.9)

-f

HFOV

Approximate horizontal field of view of input images, use if

EXIF

info
not complete

-m

Optimize field of view for all images, except for first. Useful for
aligning focus stacks with slightly different magnification.

-d

Optimize radial distortion for all images, except for first.

-i

Optimize image center shift for all images, except for first.

-x

Optimize X coordinate of camera position

-y

Optimize Y coordinate of camera position

-z

Optimize Z coordinate of camera position

-S

Assume stereo images - allow horizontal shift of control points.

-A

Align stereo window - assumes -S

-P

Align stereo window with pop-out effect - assumes -S

-C

Auto crop the image to the area covered by all images

-cnum

Number of control points (per grid) to create between adjacent images
(default: 8)

-l

Assume linear input files

-sscale

Scale down image by 2^scale (default: 1 [2x down-sampling])

-ggsize

Break image into a rectangular grid (gsize x gsize) and attempt to
find num control points in each section (default: 5 [5x5 grid])

--distortion

Try to load distortion information from lens database

--use-given-order

Use the image order as given on the command line.
(By default images will be sorted by exposure values.)